Not necessarily... If you could send me feedback from each computer (with the log files option checked) I should be able to tell you exactly why this is happening.

Be sure to include your name and whether it's the low or high quality computer. In fact, a screenshot from each would be great. Before you submit the comment, just hit F12 to take a screenshot and then check the "include Universe Sandbox - 2009xxxxxxxxxxx.png" file. This defaults to the last screenshot you've taken.

In the comment section type something like:"It's Naru523. This is from the computer that's low quality."